[ALSA] Add missing TLV callbacks for HD-audio codecs

Added missing TLV callbacks for HD-audio codec supports.
Also cleaned up the tlv callback for ad1986a (no mutex is needed there).

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 7eaf755..887b52e 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -1528,6 +1528,7 @@
 		.info = snd_hda_mixer_amp_volume_info,
 		.get = snd_hda_mixer_amp_volume_get,
 		.put = vaio_master_vol_put,
+		.tlv = { .c = snd_hda_mixer_amp_tlv },
 		.private_value = HDA_COMPOSE_AMP_VAL(0x02, 3, 0, HDA_OUTPUT),
 	},
 	{